TESTIMONIALS.

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circles of wire crossing each other under the bottom,merely to keep the form. If this paper boiler befilled with water, and put over a red-hot place onthe fire , where there is no smoke, it will boil awaywithout even discolouring the paper. With greatcare, the boiler may be a bank-note ; and with per-fect safety notes may be doubled up, and boiled inthe water, with only paper betwixt them and red-heat, and afterwards dried; or, as the inside of aloaf in an oven is preserved for hours from beingmore than boiled , under circumstances wherein itwould be reduced to a blackened, charred mass,were it not for its own self-contained moisture,materials the most combustible are kept frominjury in a similar but more perfect manner, withinthese boxes, when surrounded with burning coal.The same heat that would serve to make an ironsafe red-hot in twenty-minutes will not bring theinterior of Milners' boxes, of one foot inside measure-ment (which dimensions are necessary for the fulladvantage of the resistance and reaction of thisprinciple) to the boiling point, 212°, which coolsdown rapidly the moment the fire subsides around.Whereas the red-hot iron safe remains an immove-able burning prison for its dry contents, consumingthem for hours after the fire has left them. Inshort, the Milners’ safe and the iron safe, standingnear each other in Messrs. Walker’s fire, may beaptly compared to an oven and boiler in vigorousoperation. In which of the two would you deposit

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